Vacuum tane



Ma 3, 1927. I y c. s NELSON 1,627,293

VACUUM TANK Filed Oct. 2:, 1926' vwcntm C/Ior/es .5 Ive/60!? (Tummy Patented I May 3, 1927.

cnnnnnssse n-nnsem'ior:ceconmnmwmAHox- -My present invention relates, to, imprdvg ments in vacuum tanks for fuse in liq; fuell feeding systemscif e ernal; ombustismi 7 ng nes, adapted for u e: ith v u c eh esg nd for: alum-mung; d heating burns-s Tljie' vacu un and othen similar appliances, tankis ot s ype 11' ving a'ficat. contm l nd'l maintained. gasoline ,level, einployingitwo.

floats in separated tanks'j The floats 70 their; movement automatically"control sucv cn emthe vacuiuntank, andsf ed Qfigas:

olinet the vacuum anltas Well. s clm s-' .sion of gasql nevflroml he acuum ank o he, ed. ank, specti ely, h eed, ankbei q; 1 telh imes n mmunicatio with the car bureten. "Lhe' n ent on also embodies; a

lve device pe ated; by one of. hjqfflQat nd}. an; v nt; f; he acuum tank; y mean 1 l 6,-

( or; cenjtln lingdm uc ion line 20 p rts. ope ate witli. eflieiencyl relie ability. By the tltlliilifitillqn of.- the devi'ce of myinvention a W ae unis, pwi'l s hich. s a simp e. n ons ru ti n nd; opera:

enpamlr n. which he parts ate gmpa t y rangsdisto insure n fif iQIl gaso n gie dr ing system. byme n of: which. ni or a d egulated; feed. f; he rgas n to is memes i vaut nlMic -11y,ac bmp shedi1.-

The invention consists in certain novel" comb n tions. and; rr ngements o p rts. a

will hereinafter be more fully pointed out;

dg leimedt Inth ac ompa lustrated' one comp ical embodiment ofuny invention wh erein the P ltsare ing drawings, L lrave ii;

to the best mode I have so far devised "for? the practicaljapplication ofthe principles of" my invention. K p t Figure 1 is vertical l sectional view of a vacuu ntank enibodyin-g my invention" show ing the air vent to; the atmosphere open "and" thejsuction valve closed; 7 V

I Egg 2 is a transverse sectionalFvi'ew' through the vacuum tank; or-cliamber and; Fig. 3 is an enlargedide'tailgsectionalfiview' of the jair, valve device enclosedwithihthe vacuum tank;

Incarryinggout my invention, I preferably use a pair of'glass cylindersas 1 and 2, the former being used as the vacuum or. inlet chamber, and the latter as the main feed tank. A flanged top 3 is provided for the vacuum tank and a similar flanged plate 4 is provided as the bottom of the main feed tank. Betweenv the two glass cylinders is ete exampleofithe hys combined 1 and arranged according interposed an intermediate partition 5.11am l. l d ingdouh e flanges ndrgaskets 0K packms rings aregused betweenjthe partition meme, glasslcylinders, well-L as between the tops d; s tomumembers, and the gla s cylinde s; to; lnslllie air and. liquid tight joints, A, suitablejnumber, of tie bolts, 61 areg-us'ed, to connect the top and bfll M9111, members 3, (111 011.

4 tog th xgandinu sare pl'fividedifor, claim;-

gfih 9ylintle s nd heir nd Bart's as 111- icated: 1n 1iga 1i a The vgasolne supply ',pipe *4 which is eon ect di to; a suitabl upp y t nk. is yijnt o uaedv o the pper portion'l i he vacuunn nktthrqugh. th on r. ijdji 3;; 1'1dl uction.

1 a uum Sn p 8 i a onnected; p91 v .1

to p jil and eitends to the engine "or, motor. n, ir. ent.- p fpe 126 qthshtmosRher is 50 c miecte l o he-,hlate disc '3'for i g; l

the], top of the vacuum tanlc The niaii; feed." tank.,2i is providedwith an outlet pipe. 10 connected to the'bottoin' p late -4', and; a val'vlef 11 in this pipe controls the flow, oiigaso-linef to thefcarbureter usual" manner. A drain 8o cock 12 is also provided'giir-the'bottomgplate. 4 for drainingj{the-interior of "the main teed; tank2i 7 An overflow vent port: as '13; is, provided in, the interlnediatepartition 5, anda ,vent pipe;

14sis' connectedwliereto exterior of" thegtank and rises "above the gasqlineilevel" in: the" vacuumptanlell; to perform the functions of; anoverflow pipe for the main'fee'd tank; v

F or controlling'the admission ofthe sup-to ply of gasoline through pipe-7, the suction" pipe or line 8 is provide d with a tubular. casing 15 having a port; 16; and the air vent pipe. 9.;iscoj1n'ectd with a, similar tubulE r-casingH' having a port 1 8i Thesetw'o 5 casings "15; and 17 are rigid with "the top. inember3 and" pro ectq downwardly there from in thefupp er portion" of the vacuu n chamloen, "lhe'itubulttn' casingsnrre spaced equidistant-item the center of thfe cylindri 1 0 "cal-vacuum chamber and are closed except.

for theirlrespectiveports-16 and 18L'Tliese' v ports-are controlledlbyslide valvesllfiand 20';

the former for the suction pipe;a11d'*tlie lat ter for the air vent, pipe." Thewalvesasbest seen in F 'gs- 3arein tl-iefor-m-o'f circular LLISCS and they are held against the flat surfaces 18 whichv surround the ports in the two casings 15 and 17. The two valves or discs 19 and 20 frictionally engage these surfaces, and are adapted to slide vertically while in contact therewith. When the port 16 is closed, the port 18 is open, and vice versa.

The two valves are carried on a rock arm 21'located in the upper part of the vacuum chamber, and the valves are secured at the opposite ends of this arm by means of pins 22, in suitable manner. The rock arm is pivoted at 23 to a suspending bracket 24 that projects down from the under side of the tank top 3; p

'lhesetwovalv'es are controlled in their movements by a float25 located in the vacuum' tank. This float isfashion'ed with a central tube 26 to accommodate a stem 27, and the stem is provided with an upper stop member 28 and a lower stop member 29. The float is permitted to have a vertical movement with relation to the stem 27 before it strikes or contacts with either of these abutments or stop devices. The gasoline level in the vacuum tankis controlled by the float, and the valves when operated by the float are manipulated with a snap action to insure a quick and reliable opening orclosing movement 01 the valves. For this purpose, a bell crank lever 30 is pivoted at 31 in a bracket 32 which also projects from the under side of the top 3 into the upper portion of the vacuum chamber, and the bell crank lever is pivoted at the lower end of this bracket. Two springs 33 are connected to thearm 34 of the bell crank lever, and anchored to the opposite sides of the bracket 32, and as seen in F igQl, the springs are offset from the pivot point 31 to insure a snap action when they become overbalance'd; The bell crank lever is also pivoted at 35 to the vertically arranged stem 27 which passes through the float25, and the bell crank lever 30 is provided-with a pair of spaced arms 36. .These arms are located in horizontal position and are adapted for coaction with the rock arm 21, One of the arms '36 pro jects across the rock arm and above it, while the other arm projects below the rock arm.

In Fig. 1, it will be apparent that when the level of the gasoline-falls suflieiently to permit the float 25 to engage the stop 29, and then the level continues to fall carrying with it the float25, the float will swing the bell cranklever until the springs 33 are overbalanced, and then with a snap action, the upper arm 36 will strike the rock arm 21 to cause opening of the suction valve port 16, and closing of the atmospheric valve port 18. Under these conditions, the gasoline is fed through the pipe .7 to thevacuum tank until the float 25 rises with the level of the through controlled by a valve 38 the lower arm 36 strikes the rock arm 21 to cause the suction valve port to be closed and the atmospheric valve port to be opened, thus cutting off the supply of gasoline pipe '7." These operations of the valves continue automatically while the feed SyStmH l S in operation,

The" gasoline passes from the vacuum chamber to the main feed tank 2 through a port 37 in the partition 5, and this port is pivotally carried at the end of a lever 39 which is pivoted at 40 on a bracket projecting fromthe' under side of the partition 5. The valve 38 is controlled by a counterweight 41 on the lever 39' which counterbalances the float 42 supported from the valve and provided with a stem 43.which extends down into a guide tube 44 that is secured to the inner face of the bottom plate of the main feed tank. Therise and fall of the float 42 controls the admission of gasoline from the vacuum tank through port 37 to the main feed tank 2, and the gasoline is adapted to flow from the main feed tank at all times through the pipe 10 to the carburetor. ed as described by the pipe 14.

pivotally The main feed tank is vent- It will be apparent from the above de scription taken in connection with my drawum tank, andfeed of gasoline to the vacuum 1 tank and admission of gasoline from the vacuum tank to the feed tank, to insure a constant and uniform feed of gasoline to the engine or motor. s 7

Having thus fully described my invention, what I claim as new and desire to by Letters Patent is The combination with vacuum tank having a tubular casing connected with the suction pipe and a second tubular casing con{ nected with an air vent pipe, and ports in secure said casings, of a pivoted rock arm within the vacuum tank having a-suction valve and an air vent valve at its opposite ends for coaction with said ports, a bell crank lever and an overbalancing spring therefor,'a float opand a pair ofspaced arms on said lever for co-action with the rock arm. I v

In testimony whereof I aflix my signature.

CHARLES S. NELSON.

veratively connected to said bell crank lever, 

